/* ============================================
   HEADER STYLES — Ezotera Frontend
   Navigation, logo, mobile menu, dropdowns
   ============================================ */

/* ----- Header Container ----- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--color-primary);
    z-index: var(--z-sticky);
    transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.header--scrolled {
    background-color: var(--color-primary-dark);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}


/* ----- Logo ----- */
.header__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    z-index: var(--z-overlay);
}

.header__logo-icon {
    width: 36px;
    height: 36px;
}

.header__logo-text {
    font-family: var(--font-heading);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    letter-spacing: 0.5px;
}

.header__logo-text span {
    color: var(--color-accent-light);
}


/* ----- Desktop Navigation ----- */
.header__nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.header__nav-item {
    position: relative;
}

.header__nav-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: var(--spacing-sm) var(--spacing-md);
    color: rgba(255, 255, 255, 0.85);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background-color var(--transition-fast);
    white-space: nowrap;
}

.header__nav-link:hover {
    color: var(--color-white);
    background-color: rgba(255, 255, 255, 0.08);
}

.header__nav-link--active {
    color: var(--color-accent-light);
}

.header__nav-arrow {
    width: 12px;
    height: 12px;
    transition: transform var(--transition-fast);
    fill: currentColor;
}

/* Arrow rotation handled via .header__nav-item--open in dropdown section */


/* ----- Dropdown Menu ----- */
.header__dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(0);
    min-width: 220px;
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-sm) 0;
    padding-top: calc(var(--spacing-sm) + 6px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    pointer-events: none;
    z-index: var(--z-dropdown);
}

/* Invisible bridge to prevent gap-hover loss */
.header__dropdown::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 0;
    right: 0;
    height: 12px;
    background: transparent;
}

/* JS-controlled open state replaces pure :hover */
.header__nav-item--open > .header__dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
}

/* Arrow rotation when open */
.header__nav-item--open > .header__nav-link .header__nav-arrow {
    transform: rotate(180deg);
}

.header__dropdown-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.header__dropdown-link:hover {
    background-color: var(--color-off-white);
    color: var(--color-accent);
}


/* ----- Header Actions (Sign In, CTA) ----- */
.header__actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-shrink: 0;
    white-space: nowrap;
}

.header__sign-in {
    color: rgba(255, 255, 255, 0.85);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: color var(--transition-fast);
}

.header__sign-in:hover {
    color: var(--color-white);
}

.header__cta {
    padding: 10px 24px;
    font-size: var(--font-size-sm);
}


/* ----- Mobile Menu Toggle ----- */
.header__burger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 28px;
    height: 28px;
    cursor: pointer;
    z-index: var(--z-overlay);
}

.header__burger-line {
    width: 100%;
    height: 2px;
    background-color: var(--color-white);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-fast);
}

.header__burger--active .header__burger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.header__burger--active .header__burger-line:nth-child(2) {
    opacity: 0;
}

.header__burger--active .header__burger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}


/* ----- Mobile Navigation Overlay ----- */
.header__mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-primary);
    padding: calc(var(--header-height) + var(--spacing-xl)) var(--container-padding) var(--spacing-xl);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base);
    z-index: var(--z-overlay);
}

.header__mobile-nav--open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.header__mobile-nav-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header__mobile-nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    color: var(--color-white);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-medium);
}

.header__mobile-dropdown {
    display: none;
    padding-bottom: var(--spacing-md);
}

.header__mobile-dropdown--open {
    display: block;
}

.header__mobile-dropdown-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-base);
}

.header__mobile-dropdown-link:hover {
    color: var(--color-accent-light);
}

.header__mobile-actions {
    margin-top: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}


/* ----- Responsive ----- */

/* Laptop */
@media (max-width: 1024px) {
    .header__nav {
        gap: 0;
    }

    .header__nav-link {
        padding: var(--spacing-sm) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
}

/* Tablet and below — also covers narrow laptop where all nav items don't fit */
@media (max-width: 1100px) {
    .header__nav {
        display: none;
    }

    .header__actions {
        display: none;
    }

    .header__burger {
        display: flex;
    }
}